518 GENERAL ANATOMY. 



ic nerves: he has observed the inflammation of the semi-lunar 

 or coeliac ganglions, in cases of chronic abdominal neuropathy, 

 hoopi ng-cough, and tetanus; he has also observed in several cases 

 the inflammation of the cardiac and pulmonary nerves. Au- 

 tenreith has also observed in hooping-cough the inflammation 

 of the par vagum, sympathetic, and cardiac. Duncan has seen 

 in a case of diabetes the abdominal portion of the sympathetic 

 nerve three or four times larger than usual. 



The sympathetic nerves are, like the others, augmented in 

 volume in hypertrophies, diminished, on the contrary, in sim- 

 ple atrophies, as well as in those which result from an acci- 

 dental production infiltrated into the tissue of an organ. 



Many abdominal and thoracic diseases seem besides to de- 

 pend on an irregular action of the sympathetic nerve; and 

 others, very numerous also, on the anormal action of this nerve 

 upon the cerebral nervous centre. 



